/*
 * Copyright 2021 Haulmont.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.jmix.data.impl;

/**
 * Interface to be implemented by JPQL constant handlers.
 * <p>The implementation must be a managed bean with "prototype" scope.</p>
 */
public interface QueryConstantHandler {

    /**
     * Replaces constant with real JPQL code. If constant is not found, the source query string is returned.
     *
     * @param queryString source query string
     * @return query string with constant replaced
     */
    String expandConstant(String queryString);
}
